This should be Areva's time in the sun. As governments search for clean, renewable energy sources and consumers worry about volatile oil prices, nuclear power is hot again. The fear of nuclear accidents like the one at Three Mile Island in 1979 or at Chernobyl in 1986 has begun to fade as nuclear's backers make their case in a world growing warmer. Nuclear plants, goes their argument, provide a steady supply of relatively cheap energy with zero carbon emissions. The new enthusiasm for nuclear is measurable. Over the next decade, the...